<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>参数列表</el-breadcrumb-item>
		</el-breadcrumb>

		<el-card>
			<el-alert title="注意:只允许为第三级分类设置相关参数" :closable="false" type="warning" show-icon>
			</el-alert>

			<el-row class="cat_opt">
				<el-col>
					<span>选择商品分类： </span>
					<el-cascader v-model="SelectedCateKeys" :options="cateList" :props="cateProps"
						@change="handleChange"></el-cascader>
				</el-col>
			</el-row>

			<el-tabs v-model="activeName" @tab-click="handleTabClick">
				<el-tab-pane label="动态参数" name="many">
					<el-button @click="addDialogVisible = true" :disabled="isBtnDisabled" type="primary" size="mini">
						添加参数</el-button>

					<el-table :data="manyTableData" border stripe>
						<el-table-column type="expand">
							<template v-slot="scope">
								<el-tag @close="handleClose(index, scope.row)" closable
									v-for="(item,index) in scope.row.attr_vals" :key="index">{{item}}
								</el-tag>
								<el-input class="input-new-tag" v-if="scope.row.inputVisible"
									v-model="scope.row.inputValue" ref="saveTagInput" size="small"
									@keyup.enter.native="handleInputConfirm(scope.row)"
									@blur="handleInputConfirm(scope.row)">
								</el-input>
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+
									New Tag</el-button>
							</template>
						</el-table-column>
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column label="参数名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作">
							<template v-slot="scope">
								<el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary"
									icon="el-icon-edit">编辑</el-button>
								<el-button @click="removeParmas(scope.row.attr_id)" size="mini" type="danger"
									icon="el-icon-delete">删除</el-button>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
				<el-tab-pane label="静态属性" name="only">
					<el-button @click="addDialogVisible = true" :disabled="isBtnDisabled" type="primary" size="mini">
						添加属性</el-button>

					<el-table :data="onlyTableData" border stripe>
						<el-table-column type="expand">
							<template v-slot="scope">
								<el-tag @close="handleClose(index, scope.row)" closable
									v-for="(item,index) in scope.row.attr_vals" :key="index">{{item}}
								</el-tag>
								<el-input class="input-new-tag" v-if="scope.row.inputVisible"
									v-model="scope.row.inputValue" ref="saveTagInput" size="small"
									@keyup.enter.native="handleInputConfirm(scope.row)"
									@blur="handleInputConfirm(scope.row)">
								</el-input>
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+
									New Tag</el-button>
							</template>
						</el-table-column>
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column label="属性名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作">
							<template v-slot="scope">
								<el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary"
									icon="el-icon-edit">编辑</el-button>
								<el-button @click="removeParmas(scope.row.attr_id)" size="mini" type="danger"
									icon="el-icon-delete">删除</el-button>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
			</el-tabs>
		</el-card>

		<el-dialog @close="addDialogClosed" :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%">
			<el-form ref="addFormRef" :rules="addFormRule" :model="addForm" label-width="100px">
				<el-form-item :label="titleText" prop="attr_name">
					<el-input v-model="addForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addParams">确 定</el-button>
			</span>
		</el-dialog>

		<el-dialog @close="editDialogClosed" :title="'修改' + titleText" :visible.sync="editDialogVisible" width="50%">
			<el-form ref="editFormRef" :rules="editFormRule" :model="editForm" label-width="100px">
				<el-form-item :label="titleText" prop="attr_name">
					<el-input v-model="editForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editParams">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				cateList: [],
				cateProps: {
					expandTrigger: 'hover',
					value: 'cat_id',
					label: 'cat_name',
					children: 'children'
				},
				SelectedCateKeys: [],
				activeName: 'many',
				manyTableData: [],
				onlyTableData: [],
				addDialogVisible: false,
				addForm: {
					attr_name: '',
				},
				addFormRule: {
					attr_name: [{
						required: true,
						message: '请输入参数名称',
						trigger: 'blur'
					}]
				},
				editDialogVisible: false,
				editForm: {},
				editFormRule: {
					attr_name: [{
						required: true,
						message: '请输入参数名称',
						trigger: 'blur'
					}]
				},


			}
		},

		created() {
			this.getCateList()
		},

		methods: {
			async getCateList() {
				const {
					data: res
				} = await this.$request.get("categories")
				if (res.meta.status !== 200) return this.$message.error("获取商品数据失败")
				this.cateList = res.data
			},

			async getParamsData() {
				const {
					data: res
				} = await this.$request.get(`categories/${this.cateId}/attributes`, {
					params: {
						sel: this.activeName
					}
				})
				if (res.meta.status !== 200) return this.$message.error("获取参数列表失败")

				res.data.forEach(item => {
					item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []

					item.inputVisible = false
					item.inputValue = ''
				})

				if (this.activeName === 'many') {
					this.manyTableData = res.data
				} else {
					this.onlyTableData = res.data
				}
			},

			handleChange() {
				if (this.SelectedCateKeys.length !== 3) {
					this.SelectedCateKeys = []
					this.manyTableData = []
					this.onlyTableData = []
					return
				}
				this.getParamsData()
			},

			handleTabClick() {
				this.getParamsData()
			},

			addDialogClosed() {
				this.$refs.addFormRef.resetFields()
			},

			addParams() {
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return
					const {
						data: res
					} = await this.$request.post(`categories/${this.cateId}/attributes`, {
						attr_name: this.addForm.attr_name,
						attr_sel: this.activeName
					})
					if (res.meta.status !== 201) return this.$message.error("添加失败")
					this.$message.success("添加成功")
					this.addDialogVisible = false
					this.getParamsData()
				})
			},

			async showEditDialog(attr_id) {
				const {
					data: res
				} = await this.$request.get(`categories/${this.cateId}/attributes/${attr_id}`, {
					params: {
						attr_sel: this.activeName
					}
				})

				if (res.meta.status !== 200) return this.$message.error("获取参数信息失败")
				this.editForm = res.data
				this.editDialogVisible = true
			},

			editDialogClosed() {
				this.$refs.editFormRef.resetFields()
			},

			editParams() {
				this.$refs.editFormRef.validate(async valid => {
					if (!valid) return
					const {
						data: res
					} = await this.$request.put(
						`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
							attr_name: this.editForm.attr_name,
							attr_sel: this.activeName
						})

					if (res.meta.status !== 200) return this.$message.error("修改参数失败")
					this.$message.success("修改参数成功")
					this.getParamsData()
					this.editDialogVisible = false
				})
			},

			async removeParmas(attr_id) {
				const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)

				if (confirmResult !== 'confirm') return this.$message("取消了删除")

				const {
					data: res
				} = await this.$request.delete(`categories/${this.cateId}/attributes/${attr_id}`)
				if (res.meta.status !== 200) return this.$message.error("删除参数失败")
				this.$message.success("删除参数成功")
				this.getParamsData()
			},

			async saveAttrvals(row) {
				const {
					data: res
				} = await this.$request.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
					attr_name: row.attr_name,
					attr_sel: this.activeName,
					attr_vals: row.attr_vals.join(",")
				})

				if (res.meta.status !== 200) return this.$message.error("修改参数失败")
				this.$message.success("修改参数成功")
			},

			handleInputConfirm(row) {
				if (row.inputValue.trim().length === 0) {
					row.inputValue = ''
					row.inputVisible = false
					return
				}
				row.attr_vals.push(row.inputValue.trim())
				row.inputValue = ''
				row.inputVisible = false

				this.saveAttrvals(row)
			},

			showInput(row) {
				row.inputVisible = true
				this.$nextTick(_ => {
					this.$refs.saveTagInput.$refs.input.focus();
				});
			},

			handleClose(index, row) {
				row.attr_vals.splice(index, 1)
				this.saveAttrvals(row)
			},
		},

		computed: {
			isBtnDisabled() {
				if (this.SelectedCateKeys.length !== 3) {
					return true
				}
				return false
			},

			cateId() {
				if (this.SelectedCateKeys.length === 3) {
					return this.SelectedCateKeys[2]
				}
				return null
			},

			titleText() {
				if (this.activeName === 'many') {
					return '动态参数'
				} else {
					return '静态属性'
				}
			}
		},
	}
</script>

<style lang="less" scoped>
	.cat_opt {
		margin: 15px 0;
	}

	.el-tag {
		margin: 10px;
	}

	.input-new-tag {
		width: 120px;
	}
</style>
